<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>列表过滤</title>
    <script type="text/javascript" src="../js/vue.js"></script>
</head>
<body>
    <div id="root">
        <h2>人员列表</h2>
        <input type="text" placeholder="请输入名字"  v-model="keyWord"/>
        <ul>
            <li v-for="(p,index) of filPerson" :key="p.id"><!-- 默认key为index 会存在虚拟dom复用问题 -->
                {{p.id}}-{{p.name}}-{{p.age}}-{{p.sex}}
            </li>
        </ul>
    </div>
    <script type="text/javascript"> 
    Vue.config.productionTip=false, //关闭开发者环境下的提示
        new Vue({
          el:'#root',
          data:{
              keyWord:"",
              persons:[
                  {id:'001',name:'马冬梅',age:19,sex:'女'},
                  {id:'002',name:'周冬雨',age:20,sex:'女'},
                  {id:'003',name:'周杰伦',age:21,sex:'男'},
                  {id:'004',name:'温兆伦',age:22,sex:'男'}
                ],
                //filPerson:[]
            },
          //#region
          /* watch:{
            keyWord:{
                immediate:true,//页面初始化时调用一次 空字符串indexOf("") 返回0,查询出所有数据
                handler(newValue,oldValue){
                    this.filPerson=this.persons.filter(p=>{
                    return p.name.indexOf(newValue)!==-1
                })  
              },
            }
          }, */
          //#endregion
          computed:{
            filPerson(){
                 return this.persons.filter(p=>{
                    return  p.name.indexOf(this.keyWord)!==-1
                })
            },

          }
        })
      </script>
</body>
</html>